Both Versions replace Battle Cry of TTT2 because that was the perfect song to use length wise.
Place in your "TEKKEN 8\Polaris\Content\Paks\Mods" if that doesnt work place in the ~mods folder. If you have a LogicMods folder instead and the mod doesnt work add _P to the end of the .PAK file.
Also Im not sure why every version of the Instrumental sounds a little compressed, sorry about that.